Answers

Add 72/84 and 15/54

72/84 + 15/54 is 143/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 54 is 756
   
   Next, find the equivalent fraction of both fractional numbers with denominator 756
2. For the 1st fraction, since 84 × 9 = 756,
   72/84 = 72 × 9/84 × 9 = 648/756
3. Likewise, for the 2nd fraction, since 54 × 14 = 756,
   15/54 = 15 × 14/54 × 14 = 210/756
4. Add the two like fractions:
   648/756 + 210/756 = 648 + 210/756 = 858/756
5. 858/756 simplified gives 143/126
6. So, 72/84 + 15/54 = 143/126
   In mixed form: 117/126

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